Pump



PUMP

Filed Oct. 17, 1924 L. LE BRET Illl...

Jnvenor Jan) 5 Mnesses:

PATENT CFFICE.

'LUDWIG LF. BRET, OF CHARLOTTENBURG, GERMANY.

PUMP.

Application. filed October 17, 1924. Serial No. 744,247.

To all whom t may concern.'

Be it vknown that I, LUDWIG LE BREW, a German citizen, and residing atCharlottenburg', Germany, have invented certain new and usefulImprovements in a Pump (for which I have made application for patent 1nGermany on 9th November, 1923, Patent No. 399.511), of ywhich thefollowing is a specification. .'i y n This invention relates to animproved i pump for a supply of different liquid quantities to aplurality of consumption places by means of one plunger only, comprisinga rotary plunger- -drum and a cam driving mechanism for thereciprocating motion of the latter consisting of a disclike extension onsaid drum'having camsthereon of a corresponding number to that of theconsumptionplaces and of which one forms a pressure `and suction cam andthe others pressure cams only and of an endless cain groove consistingof a number of cam portions corresponding to that of the consumptionplaces and bounded by a suction cam race formed of separately adjustablecam pieces and by an adjustable integral pressure cam race, all saidcams being in contact with said pressure cam race while the pressure andsuction cam only is also in con tact with said suction cam race.

The advantages are: best positive guiding of the plunger drum, largecontact surfaces between cams and cam races, cific want of surface forthe guiding planes, and a resultant acting oli-the middle of the plungerdrum as a principal power.

The accompanying drawing illustrates in Fig. 1 -in a centrallongitudinal section a preferred form of construction of the iniprovedarrangement for four places of consumption, while Fig. 2 shows theendless cam groove in its development, with different positions of theintegral pressure cam race and ofthe suction cani race pieces. Fig. 3shows part of Fig. 1 only, and Fig. 4 is a` similar view toFig. 1illustrating a modification of the arrangement.

In a cylinder 1 the plunger drum 4 is rotatably mounted and adapted tobe set in rotation by, means of a worm gearingQ, 3.- In acentral boring5 of said drum astationary lplun er 6 is fitted'.l The plunger drum hasa isclike extension 7 on which, corresponding to the number of consump--tion places, four cams are provided, of

which three form pressure cams 8 and onesmallest spea pressure andsuction cam 9. Said cams 8 and 9 run in an endless cam groove bounded bya suction cam race formed of adjustable cam pieces 10 and by an integralpressure cam race 12 and impart thereby to the plunger drum 4 itsreciprocating motion. All the cams 8 and 9, while acting in coinmon andsimultaneously, impart to the plungerdrum its pressure stroke; 4henceresult extremely favourable working conditions during the pressureperiods. The suction stroke is effected by the cam 9 only,'the

Asame alone being so dimensioned that it can slide along the adjustablesuction cam race. The formation of the suction cam 9 and of the canirace pieces 10 of the suction cam race offer absolute guarantee for areliable suction work. The cam groove consists, as shown in Fig. 2, ofas many pressure and suction* cam portions as there are consumptionplaces. The change of the determination of the quantity of supply to thesingle consumpt-ion places separately or to all of them commonly iseffected y non-moved constructional members and can thus take placeduring the working of the'i pump.

'For this purpose, each cam piece 10 of the suction cam race can beadjusted with reference to said pressure cam race by having each aseparate regulating screw 11 attached thereto (Figs. 1/3), separatelyand inde-` pendently of the othercam pieces y10, the stroke of theplunger drum 4-and thus the determination of the quantity of supply tothe corresponding consumption place-beng thereby controlled from zero toa maximum. The integral pressure cani race 12 can be adjusted withreference to the suction cam race (see different positions of same inthe left hand and right hand half of Fig. 2), for instance by means of ascrew-spindle 14 in the cover 13 of the cylinder 1, for the purpose ofallowing, if desired, a simultaneous and common change of the quantitiesof supply to all consumption places.`

The boring 15 in the plunger drum coincides at each'suction stroke withthe orifice of a suction pipe 16 in the cylinder 1, while the boring 17in the plunger drum supplies the quantities of liquid at each pressurestroke through the pressure pipes 18 to the consumption places.

Obviously, the invention is not bound to the particular form ofconstruction illustrated in Fig. 1, modifications thereof being possiblewithinthe scope of the invention.

For instance, as shown in Fig. 4, the member 4 could be integral Withthe Worm Wheel 3 and the central boring 5 provided in the upper part ofthe member 4a in which case the plunger 6 Working therein must beconnected with the cam disc 7 and controlled by a tappet 19 in themember 43. The other reference letters in Fig. nate corresponding partsto those 1, namely: 1a the cylinder, 2 the Worm of the Worm gearing, 8athe pressure cams, 9a the pressure and suction cam, l()EL the adjustablecam pieces, 11a the j regulating screws for the latter, 12a the integralpressure cam race, 15 the boring in the plunger drum 4a, 16a the suctionpipe in the cylinder .1*1, 17 the other boring in the plunger drum, and18n the pressure pipe in the cylinder la.

Vhat I claim, is:

1. In a pump for a supply liquid tionplaces by means of one plungeronly:

the combination of a rotaryplunger drum,

in Fig.

of different a Idsiclike extension on said drum, cams on.

said extension of a corresponding number to that of the consumptionplaces and of which one forms a pressure and suction cam 4desigquantities to a plurality of consumpand the others pressure camsonly', all said cams having a common and simultaneous action, a suctioncam race formed of separate cam pieces and an integral pressure camrace, Said races forming between them an endless cam grooveconsisting'of a num. ber of cam portions corresponding to that of theconsumption places, substantially as set forth. v

2. A pump 'as specified in claim l, in

which all said cams are in Contact with said pressure cam race While thepressure and suction cam only is also in contact with said section camrace, substantially as set forth.

3. A pump as specified in claim l: in which each cam piece of saidsuction cam race is adjustable with reference to said pressure cam raceseparately and independently of the other cam pieces, substantially asset forth.

4. A pump as specified in claim 1, in which said integral pressure camrace is adjustable with reference to said suction cam race,substantially as set forth.

In testimony whereof I have hereunto set my hand.

LUDWIG LE BRET.

